Compaq Armada 110 Maintenance And Service Manual page 146

Where used: 4 screws securing the system board to the base enclosure
through the computer bottom (documented in Section 5.17)
Maintenance and Service Guide
Table C-3
M2.5 × 7 Screw (Continued)
Color
Black
Qty Length
25 7 mm
Screw Listing
Head
Thread Width
M2.5 4.5 mm
C–9